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. 2015 Jul 7;6:499. doi: 10.3389/fpls.2015.00499

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Copyright © 2015 Chung, Schwinn, Ngo, Lewis, Massey, Calcott, Crowhurst, Joyce, Gould, Davies and Harrison.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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High-performance liquid chromatography elution profiles of betalain pigment extracts from petals of Parakeelya mirabilis. Extracts of violet (A) and red (B) petal sectors were separated by betacyanin elution gradient and monitored at 538 nm. Red (C) petal sectors were also separated by betaxanthin elution gradient and monitored at 470 nm. The calculated proportion of total betacyanins or betaxanthins in each petal sector is shown in (D). BcI, betanin; BcI’, iso-betanin; BcII, betanidin; BcII’, iso-betanidin; BxI, vulgaxanthin I; BxII, vulgaxanthin II; BxIII, dopaxanthin; BxIV, portulacaxanthin II. The peak IDs are identical to those in Table 1.